Students dig through dirt to help with scientific research. They help to find Ice Age fossils in dirt from the mastodon matrix. Mastodons, an extinct cousin of modern elephants, roamed North America before they went extinct at the end of the last Ice Age.
Students dig through dirt to help with scientific research. They help to find Ice Age fossils in dirt from the mastodon matrix. Mastodons, an extinct cousin of modern elephants, roamed North America before they went extinct at the end of the last Ice Age.
Word lists coverage
The word and grammar lists are compiled from commercially available resources and English study websites. They are not intended to be authority. Use at your own discretion.
List
Total
Coverage
Eiken Grade 1
3,105
0.06%
Eiken Grade 2
866
1.15%
Eiken Grade 3
900
7.22%
Eiken Grade 4
600
11.5%
Eiken Grade 5
600
14.83%
Eiken Grade Pre1
2,868
0.35%
Eiken Grade Pre2
1,327
1.88%
Eiken Grade Pre2+
1,562
2.24%
NDL
875
21.71%
NGSL 1 to 1,000
1,000
17.6%
NGSL 1,001 to 2,000
1,000
4.5%
NGSL 2,001 to 3,000
801
2.25%
NGSL Supplemental
52
9.62%
Grammar lists coverage
The word and grammar lists are compiled from commercially available resources and English study websites. They are not intended to be authority. Use at your own discretion.