Students apply whole number operations rules to fractions.

1. 1/2 +1/2 = 2/4 instead of 1

2. How to help? Ask students to tell what the numerator and denominator mean, tell stories w/ relatable context, ask students to make their own stories w/ relatable context, use manipulatives.

Students get different answers with models than with symbols when the answers should be the same.

1. How to help? Ask students to decide whether both answers could be right, ask students to defend the right answer and why the other isn't correct, ask students to use the same model to show the solution, encourage students to do the problem on a number line.

Students don't find a common denominator, but apply standard algorithm.

1. 4/5+4/10=8/10 instead of 12/10 or 1 1/5

2. How to help? Ask students to model the problem on a numberline or w/ fraction strips

Students struggle w/ finding a common denominator.

1. How to help? Offer games and activities to reinforce multiplication facts, do common multiple activities, discuss that while finding a smaller common denominator has advantages, any denominator will work, ask students to discuss strategies they use to come up with a CD.

Mixed numbers: Subtract smaller fraction from larger, don't know what to do when one number is a whole number, focus only on whole number part of the problem.

1. How to help? include more mixed numbers throughout addition of fraction units, use models and contexts, make errors part of class discussions.

Intro to Fractions: Start with a basic intro to fractions. Explain that fractions represent parts of a whole and use everyday examples, like a pizza, to illustrate the concept. Similar to what we did in our Virtual Teaching lesson.

3D Printing Basics: Introduce the concept of 3D printing. Explain that it can be used to create 3D objects. Show them a 3D printer in action.

Design and Print Whole Objects: Begin by designing and printing simple 3D objects that can be easily divided into equal parts, such as cubes or rectangles. This is the whole.

Visualizing Fractions: Once the objects are printed, show the students the whole object and explain that this represents "1." Then, use a marker or colored tape to divide the object into equal parts. For example, if you have a cube, divide it into halves, thirds, or fourths. Explain that each part represents a fraction of the whole.

Interactive Learning: Let the students interact with the 3D-printed objects. Have them physically hold and manipulate the objects to understand the concept of fractions.

Comparing Fractions: Create multiple 3D objects with different fractional divisions. For example, you can have one cube divided into thirds and another into fourths. Ask the students to compare and contrast.

Adding and Subtracting Fractions:

For example, you can combine two cubes, each divided into thirds, to demonstrate 2/3 + 2/3 = 4/3.

Real-Life Applications: Discuss real-life scenarios where understanding fractions is useful, such as cooking or sharing toys. Ask for examples that they know of that fractions might apply.

Assessment and Activities: Create activities that involve using 3D-printed objects to practice working with fractions. This can include tasks like coloring in fractions of a 3D shape or creating fraction creatures with the 3D printed shapes.

Reflection and Discussion: End the lesson with a reflection and discussion. Ask students to share what they've learned and how 3D printing helped them understand fractions. Add in an exit ticket question?