17 best books preschools

Johnson and Tasha A. Johnson: This book provides guidance on starting, operating, and managing a preschool or childcare center, covering topics like business planning, curriculum development, and regulatory compliance.

"The Reflective Educator's Guide to Classroom Research" by Nancy Fichtman Dana: While not specific to preschools, this book offers insights into classroom research and reflective teaching practices, which can be adapted to early childhood education settings.

"The Power of Preschool" by Dana Suskind: Focused on the importance of early childhood education, this book discusses the impact of language development and early learning on a child's future success.

"The Creative Curriculum for Preschool" by Diane Trister Dodge: This curriculum guide offers a research-based approach to preschool education, emphasizing problem-solving and decision-making skills in young children.

"Leadership in Early Childhood Education" by Jillian Rodd: This book explores leadership in the context of early childhood education, providing insights into effective management and leadership strategies for preschool settings.

"The Business of Child Care: Management and Financial Strategies" by Gail H. Jack: While not preschool-specific, this book covers financial and management aspects of childcare businesses, which can be relevant to preschool owners and administrators.

"The Problem-Solving, Problem-Prevention, and Decision-Making Guide" by Arthur B. VanGundy: This guide offers practical techniques for enhancing problem-solving and decision-making skills, which can be valuable for educators and preschool administrators.

"Preschool Classroom Management: 150 Teacher-Tested Techniques" by Laverne Warner and Sharon Lynch: This book provides classroom management strategies and techniques tailored to preschool settings.

"Teaching with the Brain in Mind" by Eric Jensen: While not specific to preschools, this book offers insights into brain-based teaching and learning, which can inform early childhood education practices.

"The Montessori Toddler: A Parent's Guide to Raising a Curious and Responsible Human Being" by Simone Davies: This book introduces Montessori principles for toddlers and young children, emphasizing independent learning and decision-making.

These books cover a range of topics related to preschool education, leadership, management, decision-making, and problem-solving, providing valuable insights for educators, administrators, and those interested in early childhood education.

Below you can find our editor's choice of the best books preschools on the market

Todiys New 30Pcs for LM339 0.3V~+36V 50mA DIP-14 Low Power Quad Voltage Comparators IC LM339N

Based on 1 reviews Check latest price

Product description

Compatible P/N:

LM339 LM339N

Description:

Condition: 100% Brand New And High Quality

Material: Electrical Components

Color: See Pictures

Encapsulation: DIP-14

Supply Voltage: 36V or ±18V

Differential input Voltage: 36V

Input Voltage: -0.3V~+36V

Input Current (VIN<-0.3VDC)3: 50mA

Operating Temperature Range: 0 °C~+70 °C

Storage Temperature Range: -65 °C~+150 °C

Lead Soldering Temperature (10sec max): 300 °C

Size: 19mm x 8.6mm x 7.2mm

Quantity: 30 Pcs

NOTE: Kindly compare your original item with the photos provided for the listing to make sure that you are purchasing the correct part. we don't provide technical assistance please make sure you are familiar with the product before purchasing. apologize in advance.

Item Condition: Brand New
12 Months Quality Warranty
Actual item as shown in photos
Random send the part number
NOTE: Kindly compare your original item with the photos provided for the listing to make sure that you are purchasing the correct part. we don't provide technical assistance please make sure you are familiar with the product before purchasing. apologize in advance.

Texas Instruments/National Semiconductor LM339N LM339 Quad Comparator ICS (Pack of 8)

Texas Instruments/ National Semiconductor

Based on 7 reviews Check latest price

Product description

National Semiconductor LM339N LM339 Quad Comparator ICs

Overview:Comparing two voltages or currents and outputting a digital signal indicating the larger of the two has never been easier with this LM339N comparator circuit from Texas Instruments. It has an open collector output. Its typical dual supply voltage is ±3|±5|±9|±12 V, with a minimum of ±1 V and maximum of ±15 V. This comparator has a minimum operating temperature of 0 °C and a maximum of 70 °C. It has 4 channels per chip. This device is made with bipolar technology. This device uses one or two power supplies.

8-PACK National Semiconductor LM339N LM339 Quad Comparator ICs
DIP14 Wide Range of Supply Voltage - Single Supply: 2 V to 36 V Dual Supplies: ±1 V to ±18 V
Low Input Bias Current . . . 25 nA Typ
Low Input Offset Current ...3 nA Typ
Single Supply or Dual Supplies

Lock-N-Load Comparator Body, Compatible with Any Set of Calipers, Measuring Cartridges from .17 to .45 Caliber

Bylot

Based on 5 reviews Check latest price

Product description

Lock-N-Load Comparator Body, Compatible with Any Set of Calipers, Measuring Cartridges from .17 to .45 Caliber

1. Compatible with any set of calipers, measuring cartridges from .17 to .45 caliber
2. Simple and convenient operation
3. Including:5-26,14-20,1-17,6-27,8-30,13-41,7-28,10-35,3-24,2-22,11-37,12-45,9-33,4-25
4. It can also be used to check the uniformity of the bullet from the base to the target

User questions & answers

Question:	Is this just the case or the whole set of comparators
Answer:	Dear customer The light need E26 base bulb.Thanks for your question.

LM YN Digital Voltage Comparator 0-100V Voltage Measurement Control Voltage Measuring Charge Discharge Protection, Overvoltage Undervoltage, Overload Protection (12V)

Based on 11 reviews Check latest price

Product description

User manual download link:

https://www.amazon.com/clouddrive/share/56TsVN32wK4n5fdWZ1fSwyy2P6uURyK6I99IfJVuY92

Operating voltage: DC 12V (nominal voltage should not exceed +/- 10%).

Current: less than 12V, 50mA (relay action not less than 12mA, turn off the display less than 3mA).

Operating temperature: Recommended -20 ℃ -60 ℃ (the limits of -30 ℃ -70 ℃).

Measuring range: 0-99.9V.

load capacity:

Normally open relay port maximum load capacity: DC 0-30V / 10A, AC 0-250V / 10A;

Relay NC port maximum load capacity: DC 0-28V / 10A, AC 0-125V / 10A.

Module interface:

Module voltage inputs: a 4-wire interface, all the terminals are the interface, user-friendly;

1, DC +: DC power positive;

2, DC-: DC power supply negative;

3, V +: measuring voltage positive electrode;

4, V-: measure negative voltage.

Function Module：

The user can select from the following five kinds of functions in one, you can set and save function parameters are automatically saved parameter set, power-down is not lost.

Function1: Voltage measurement: this function is selected, the relay will not operate, digital display of the current measurement voltage.

Function 2: Charge monitoring: When the measured voltage falls below a preset voltage V1 and V2 in the lower one, relay, voltage V1 and V2 higher than the higher of a relay off.

Function3: Discharge Monitoring: When the measured voltage is higher than the preset voltage V1 and V2 higher one, relay, T1 and T2 voltage is lower than the lower one, the relay off.

Function 4: pull the interval: When measuring the voltage between V1 and V2 between, relay, the relay off other cases.

Function 5: interval outer pull: When the measured voltage falls below a preset voltage V1 and V2 in a lower or higher than the preset measuring a voltage higher voltages V1 and V2, the relay is energized; otherwise relay disconnect.

DVB01 module is a versatile voltage monitoring controller, using industrial grade microcontroller as the main control unit, wide measurement range, high accuracy.
Module carefully processed genuine quality components made of stable performance, it can be widely used in a variety of voltage measurement and control types of occasions. The controller 5 different preset function.
Users can set the upper limit voltage and the lower voltage limit; measuring range of DC 0-100V, measuring accuracy +/- 0.1V.
Increase automatic power saving feature, users can customize the settings; all set parameters can be automatically saved, set the content of non-volatile.
User manual download link: https://www.amazon.com/clouddrive/share/56TsVN32wK4n5fdWZ1fSwyy2P6uURyK6I99IfJVuY92

User questions & answers

Question:	Can i use this to protect a lead acid battery from overdischarge
Answer:	I use this to keep my solar charged batteries from dropping below 12.5 volts. I programmed the relay to turn on when the voltage dropped below 12.5 volts and turn off when above 12.6 volts. I used a 12 volt ac transformer and full bridge rectifier to supply 1 amp of charging current.
Question:	can you apply a time delay to the low voltage cutoff? the directions are not clear
Answer:	The relay activate and relay deactivate have their own user selectable time delays.
Question:	over nominal would only be 13.2, my vehicle on a cold start charges in the 14v range. Will this unit be able to handle that much of an operating
Answer:	Yes. I've try 14.2 without problem