| Map Quiz 1 for Chapter 21 | strayermapstimelines_ch21_1.html | 55e9c522757a2e9c26000000 |
| DLAP questions | strayermapstimelines_ch21_1_dlap.xml | 55e9c522757a2e9c26000000 |
| Map Quiz 2 for Chapter 21 | strayermapstimelines_ch21_2.html | 55e9c522757a2e9c26000000 |
| DLAP questions | strayermapstimelines_ch21_2_dlap.xml | 55e9c522757a2e9c26000000 |
| Timeline Activity for Chapter 21 | strayermapstimelines_ch21_3.html | 55e9c522757a2e9c26000000 |
| DLAP questions | strayermapstimelines_ch21_3_dlap.xml | 55e9c522757a2e9c26000000 |