The stories of Joshua have several good lesson presentations in the SunScool Bible App for Kids. Look for it under the "JOSHUA" menu in the app. Various stories and titles will appear/change depending on which of the four age-levels you preselect. Level 3 is for grades 2/3 thru 5th, approximately.
Joshua - BibleTime
All four levels have the following Joshua stories (though the titles change):
- C8-1 : Joshua becomes the new leader (Levels 1 and 2), Leading the People (L3), The New Leader - Joshua (L4)
Joshua 1:1-11,16-18; Psalm 1; Proverbs 3:5-6; James 1:22-25; Joshua 1:9 - C8-2 : Joshua and the New Land (L1 and 2), Spying the Land (L3), Sends out the Spies (L4)
Joshua 2:1-24 - C8-3 : Joshua and the Jordan (Levels 1 and 2), Crossing the River Jordan L3), Victory and Defeat L4)
Joshua 3:1-17; 4:1-24 - C8-4 : Joshua and Jericho (Levels 1 and 2), Obeying the Lord (L3), Victory and Defeat, Battle of Jericho(L4)
Joshua 6:1-27 & 7:1-26
The App is free, ecumenical, and can be downloaded for use on tablets, smartphones, Windows, and Mac! 
Get the download link and look up the story you need in our Outline of all 170+ stories in SunScool. That page also includes app helps.
