This resource could be incorporated into the lessons as an engagement activity. The site is interactive and shows a 360 degree view of different National Parks in the United States. Students could explore the different parks and identify if weathering, erosion, or deposition effected parts of the land or landforms. For lesson #3, this can be used to informally assess what students already know about glaciers, or an opportunity to have students write down or ask any questions that they come up with while exploring.
This website has a multitude of different games geared towards weathering and erosion. The game I looked at in particular was called Art of Destruction. The game focuses on how wind and water can cause erosion and weathering. The game shows how rocks are broken down in different scenarios. This would be a great resource to include in lesson #2 of the unit. Students can play the game in small groups during the explore portion of the lesson. If students finish an assignment early, playing the different games can also be a reward.
Here is an link to an explanation of the game: https://youtu.be/XeCpLWcc7h4
Study Jams! Weathering & Erosion
This is a video resource that explains what weathering and erosion is. The video uses cartoon characters to narrate and explain what weathering and erosion is to viewers. The video goes over vocabulary terms, that are also listed on the webpage. There is also an option to test students at the end with a short quiz for an informal formative assessment. The video can be incorporated into lessons #1 or #2 as a resource to use as an exit ticket or if students need further clarification during the explain portion.