Free projects and video tutorials on using Google SketchUp to make 3-D models. For K-12 and also for adults. A teaching guide is also available.

Sixth graders explore cube nets in an effort to understand what properties are common to all nets that form a cube. Students work hands-on with nets and are then pushed to use their experience to visually determine whether other nets...

Tom Richey learning module engages us in the history of the Eastern Roman or Byzantine Empire, teaching us about the founding of Constantinople, Christianity and the Byzantine-Arab Wars. Unit learning materials include primary sources,...

This is a complete lesson with instruction and a variety of exercises, teaching how to add and subtract decimals with one decimal digit (tenths).

Complete lesson with instruction and exercises, teaching students how to divide decimals using mental math.

This is a complete lesson with video instruction [5:49] and varied exercises about comparing decimals with 1 or 2 decimal digits.

This is a complete lesson with a video [7:56], instruction, and exercises about dividing decimals by decimals.

This is a complete lesson with instruction and varied exercises about how to multiply a whole number by a decimal.

Lesson includes a video & examples showing the common shortcut for multiplying & dividing decimals by powers of ten. [7:59] Provides exercises and word problems for practice.

This is a complete lesson with instruction, word problems, and exercises about adding and subtracting decimals with two decimal digits (hundredths).

This is a complete lesson with instruction and varied exercises, explaining how the place value system works with decimals that have one decimal digit, and how to write such decimals in expanded form.

This lesson contains a variety of exercises for adding and subtracting decimals with up to two decimal digits,