Contains stopword list that was created based on inverse document frequency from `SpecialEduTech`

## Examples

```
stopwords_list
#> [1] "ability" "able" "across"
#> [4] "activity" "also" "although"
#> [7] "among" "analysis" "analyzed"
#> [10] "approach" "article" "based"
#> [13] "can" "child" "class"
#> [16] "classroom" "compared" "completed"
#> [19] "condition" "conducted" "content"
#> [22] "control" "current" "data"
#> [25] "demonstrate" "describe" "design"
#> [28] "determine" "disability" "discussed"
#> [31] "education" "educator" "effect"
#> [34] "effective" "examine" "explored"
#> [37] "find" "findings" "five"
#> [40] "four" "future" "general"
#> [43] "given" "grade" "group"
#> [46] "help" "however" "i.e"
#> [49] "implication" "important" "improve"
#> [52] "improved" "improvement" "include"
#> [55] "increase" "increased" "indicate"
#> [58] "indicated" "instruction" "intervention"
#> [61] "involve" "learning" "limitations"
#> [64] "limited" "literature" "many"
#> [67] "mathematics" "may" "method"
#> [70] "often" "one" "outcome"
#> [73] "overall" "paper" "participant"
#> [76] "participated" "performance" "posttest"
#> [79] "present" "pretest" "problem"
#> [82] "provide" "purpose" "reading"
#> [85] "regarding" "research" "researchers"
#> [88] "result" "revealed" "review"
#> [91] "school" "science" "setting"
#> [94] "several" "show" "significant"
#> [97] "significantly" "skill" "special_education"
#> [100] "student" "study" "suggest"
#> [103] "support" "teach" "teacher"
#> [106] "technology" "three" "traditional"
#> [109] "treatment" "two" "use"
#> [112] "way" "well" "whether"
#> [115] "within" "without" "yet"
```